SCHEDULE 2Methods of analysis

Part I

26c.REMOVAL OF ORGANIC COMPOUNDS FROM FERTILISER EXTRACTS

REAGENTS

4.

4.1Diluted hydrochloric acid solution, about 0.5 M

Mix 1 volume of hydrochloric acid (r = 1.18 g/ml) with 20 volumes of water.

4.2Hydrogen peroxide solution (30% H2O2, ρ = 1.11 g/ml), free from trace elements